Are these removable? What kind of surface is recommended/not recommended?

To be durable enough to withstand the kitchen environment, our Peel and Stick Backsplash tiles were designed with a strong adhesive. This means that they are NOT removable in the sense that our peel and stick NuWallpaper or wall decals are removable/temporary. They can, however, be removed should you choose to- we recommend using a scraper or an object with a thin, flat surface to wiggle under a seam and pop a corner of the tile up. From there you should be able to peel off the tile with your hands. Please note that as the adhesive is strong, if installed on a painted surface the backsplash are likely to lift the paint. It is also possible that some adhesive residue may be left behind when the tiles are removed.